Drill-brace.



GMM

H. SWYER.

DRILL BRAGB.

APPLICATION FILED JAN.2'7,1914.

Patented Jan. 12, 1915.

2 SHEETS-SHEET l.

'g @JW H. SAWYER..

DRILL BRAGB.

APPLIGATION FILED 11111.27, 1914.

' Patented 1111.12, 1915.

2 SHEETS-SHEET 2.

g2/@Hofmann am f,

STATES- PATENT OFFICE. j N

HENRY SAWYER.IOF ARCTIC GENTER, RHODE ISLAND. A

, :DRILL-Bucs.

. attacca.

' Toul! whom it ma concern.:

Be it known t at I, Hrmmr Sawyer, a citizen of the United States,residing at, Arctic Center, in the county of Kent and:A Stute of Rhodeslad, have Invented certain new and useful Im rovernents 1n Drill-Braces, of which the ollowmg 1s a speel- 'tiene y he object of thisinventlon is to provide a drill brace` adapted for a wide 'range ofutility'in machinists" and carpentry work and wherein the brace may beeither used as a portable tool or connected up to a stand to operateagainst work mounted upon a work-rest.

My improved drill brace has other feai tures 'and objects which will bemore fully described in connection with the accompae nying drawings,'and which will be more particularly pointed out' and ascertalned 1n andvby the appended claims.

in the drawings :-F1gure 1s a view in elevation illustrating the deviceof my 1nvention attached to a frame stand provided with a work-rest Fig.2 isa vertical sectional view on line 2--2 of Fig. 1. Fig, 3 isa view ine ovation of a chuck shaft. Fig. 4 is `a view of one end thereof. Fig. 5is a view of the other end thereof. Fig. 6 is a sectional view of aportion of the handle sleeve structure showing the manner of journalinga crank driven shaft therein. Fig. 7 is a view in elevation of an endthrust bearing for a crank driven shaft, Fig. 8 1s a sectional view online 8-8 of Flg. 2. Fig. 9 isa bottom plan view of the chuck. Fig. 10 isa's'ectional view of a timer.

Like characters of reference designate similar parts throughout thedifferent iigures of the drawings.

' The device of my invention may be emplo ed in connection with a standhaving a b' y portion 1 from which brace-supporting arms 2 and 3 extendnear the upper portion thereof and which is provlded with an arm forminga work-rest, as lndlcated at 4.. The stand 1 may be secured to any formof support 5 by means such as bolts 6.

Referrin more particularly. to my 1mproved drlll brace, 7 designates abreast sleeve having a breast support 8 which latter is adapted for usewhen the brace drill is used as a portable mechanism.l The breast sleeve7 is provided with ears 9 adapt- Bpecication of Letters .'l'tnt.

,f Application iiled January 27, 1914. Serial No. 814,807.

Patented Jan. 12, 1915.

ed to be connected by bolts 10 with ears 11, which latter are formedonthe terminal end 12 of the arm 2.` The terminal end 12 is shaped toembrace the sleeve 7 so that the ears 9 and 11 can be disposed inabutting relation for connection by bolts 10.

A. crank-driven shaft 13 is journaled lin the breast sleeve 7 and theupper end of the shaft 13 abuts against an end thrust bearing 14, of theanti-friction type, vhaving anti-friction balls 15 and being suitablysecured to the breast' sleeve 7. Below the breast sleeve 7 I mount agear 16 upon the shaft 13, by means such as set screw 17, and below thegear 16 the shaft '13 is reduced, as at 18, and a shoulder 19 is formedat the pointof reduction; A chuck shaft 20, is socketed, as at 21, tosleeve the reduced end 1.8 and the latter is non-rotatably but slidablyconnected with the chuck shaft 20.

'and the sleeve 28 loosely surrounds the threaded chuck shaft 24. Ahandle 30 vis shown formed integral with the sleeve 28 and projectslaterally therefrom as -indi- 'cated in Fig. 1. The sleeve 28' isprovided with a bearing 31, formed integral with the sleeve andconnected by an arm 32. The sleeve 31 is provided with ears 33 adaptedto abut ears 34 formed on the terminal end 35 of supporting arm 3. Theterminal end 35 is adapted to embrace the bearing 31 and the ears 34 and33 are shown connected by bolts 36. y

A crank shaft 37 is journalcd in a 'bearing 38 which may be formed atthe terminal end of an arm 39 formed integral with and projectingupwardly from .the bearing 31. On the crank shaft 37 I fix a bevel gear40 which meshes with bevel gear 16 so as to transmit rotary motion tothe driven shaft through a 43, formed on the sleeve 28, and I interposean 4anti-friction thrust bearing 44, in the bearing 43, in a manner sothat the anti-friction balls 45 will engage the cylindrical shaft 37.and a conical vhea-d 46, formed thereon. When the nut 42 is tightenedso as to jam the crank 41 against the bearing 38, the flared or conicalend 46 l Lwill be enga ed against the balls 45.

A chuck ceding mechanism isprovided for screw` threaded engagement with.the

' chuck shaft to vaxially advance the same ment with the chuck shaftwith the sleeve 48 extending into the bearing 31 to maintain the chuckshaft in position, axially. The chuck feeding mechanism is provided withan arm- 49gwhich extends upwardly about the wheel40 and is a ertured tobe supported on the crank sha 3T, as indi- \cated at 50. A

lWith the device of my invention disposed in the mannershown in Fig. 1,it will be seen that rotation of the crank 41 will not only rotate thechuck shaft but will cause the same to be axially advanced with re-`spect to the driving shaft 13 to advance the tool, which may be adrill'or auger or screw driver or other form of tool, toward the workmounted upon arm 4. After the tool has been operated, it will be seenthat rotation of the crank in a direction opposite from a drivingdirection, will rotate `the tool out o f the work and axially withdrawthe tool from the work.

If it is desired to use the device of' my invention as a portable bracedrill,it will merely be necessary to remove bolts 10 and 36 whereuponthe device will be held for operation in substantially the samemannertherewith, and a chuck feeding means fory feeding saidl chuckshaft onrotation thereof. 2. In a hand drill, a stand, a breast sleevefixed to said stand, a handle sleeve fixed to said stand, a crank-drivenshaft rotatable in said breast sleeve, a chuck shaft non-rotatably' butslidably connected with said driven shaft and having a chuck, and 'chuckfeeding means for feeding said chuck shafton rotation thereof by saiddriven shaft. y y

' In a hand'drill, a stand, a bieast sleeve fixed to the stand, a handlesleeve fixed to the stand, a crank-driven shaft rotatable in said breastsleeve, la chuck shaft slidably and non-rotatably connected with saiddriven shaft and provided with screw threads, a chuck carried by saidchuck shaft, and threaded chuck feedlng means for engaging the threadsin said chuck shaft to advance the latter on rotation thereof.

4. In a hand drlll. a fixed sleeve, telescoping driven and chuck shaftsnon-rotatably connected with each other and'rotata'bly mounted in saidsleeve, and means associated with said sleeve and with said chuck shaftfor feeding the latter upon rotation thereof.

5. In a hand drill, a fixed upper sleeve, a

per sleeve, a gear fixed to'said driven shaft yfixed lower sleeve, adriven shaft in said upi and support-ed by said lower sleeve, anexteriorly threaded .chuck shaft telescoping and non-rotatably connectedwith said driven shaft and extending through said lower sleeve, athreaded chuck feeding device ]'ournaled in said lower sleeve and havingthreaded engagement with said chuck shaft to advance the same uponrotation thereof, a crank shaft journaled on said "lower sleeve andconnected/ with said chuck feeding device to hold the same againstrotation, and a gear on said crank shaft meshing withthe gear on saiddriven shaft to operate said chuck shaft.

6. In a hand drill, a fixed sleeve, an exteriorly threaded chuck shaftextending therethrough, a crank shaft journaled in said sleeve, a chuckfeeding device journaled in said structure and having threadedconnection with said chuck shaft to advance the latter upon rotationthereof and engaging said crank shaft whereby the chuck feeding deviceis held against rotation in .said sleeve, and means for impartingrotation to said chuck shaft upon rotatlon of said crank shaft.

7. In a hand drill, a stand having supporting arms and a work-rest arm,sleeves fixed to said supporting arms, a' driven shaftv rotatable in oneof said sleeves and a chuck shaft rotatable in the .other of saidsleeves and having telescoping non-rotative connection with said drivenshaft, a chuck feeding device having threaded engagement with said chuckshaft and being journaled in one of saidrsleeves non-rotatably toadvance .the chuck shaft upon rotation thereof by said driven shaft;Land a chuck mounted on said chuck shaft.

8. In a hand drill, a xed sleeve, an exteriorly threaded rchuck shaftextending through said sleeve and having a socket in one end thereof, achuck on the other end f said shaft, means for rotating said chuckshaft, and a chuck feeding device non-rotatably journaled in said sleeveand having tably fixed in said lower sleeve and having threadedengagement with said chuck shaft threaded engagement with said chuckshaft to advance the same as it is rotated. to advance the same as it isrotated.

9. In a hand drill, a fixed upper sleeve, a In testimony whereof I affixmy signa- 5 driven shaft therein, an end thrust bearing ture in presenceof two witnesses.

in said sleeve engaging the end of said HENRY SAWYER driven shaft, alower sleeve, an exteriorly threaded chuck shaft in the lower sleeve andWitnesses: having driven connection with said driven Loms BRmN,

1G fhaft, and a chuck feedingdevice non-rota- MORSE MEUNIER.'

